Universal piston-ring compressor



Feb. 19,1929. 1,702,914

E. D. MURPHY UNIVERSAL PISTON RING COMPRESSOR Filed March 8, 1928 Fig.2 I

Patented Feb. 19, 1929.

1 f UNITED ST EDWARD D. MURPHY, or SEATTLE, WASHINGTON.

UNIVERSAL PISTON-RING COMPBESSOR.*

Application filed March s, 1928. 1 Serial No. 260,608.

The invention-is a device that may be, placed atthe end of a cylinder which will vide means for compressingthe rings in the grooves, ofa piston which may readily be adjusted to fit a piston of any size.

A further object of the'invention is to provide means for compressing the rings of a piston as the piston is forced through it which does not require that the rings be compressed individually.

A still further object of the invention is to provide a device for compressing rings in pistons which may be stamped from a thin flat piece of material.

And a still furtherobject of the invention is to provide a device for compressing piston rings as the piston is inserted in the cylinder which is of a simple and economical construction.

Vith these ends in view the invention embodies a thin piece of material with the edges curved about a center so that when it is rolled it will form a gradually tapering cone. The

device is provided with clipsand adjustable means for holding it in a circular position.

Other features and advantages, of the invention'will appear from the following-description taken in connection with the drawings wherein Figure 1 is a cross section through the device and lower end of a cylinder showing the device as it would be used to compress the rings in a piston passing through it into the cylinder.

Figure 2 is a View showing the device in the open position or as it would appear when stamped from a flat piece of plate.

Figure 3 is a cross section through the central portion of the device looking downward and showing the adjustable means for holding it at different diameters.

In the drawings the device is shown asit would be made wherein numeral 1 indicates a flat piece of material with the edges 2 and 3 curved as shown or in such a manner that as the device is rolled as shown in Figure 3 it will produce a cone with a gradual taper as shown'in Figure 1. Clips 4 are provided at one end of the plate 1 as shown in Figures 1 and 2 which tit overthe edge at theopen end to hold one end of the device to the other. It will be seen that when assembling the device the end as indicated by, the numeral 5 may berolled and. placed through the clips shown in Figure 1. The end 5 is'aiso provided with clips 6 and 7- which are spot weld- I ed or permanently attached in any suitable manner tothe outer face of the plate. The

clip-6is provided with an opening 8 through which a bolt 9 is placed having a nut 10 on the inside andbeing attached to a chain 11 through a loop 12 at the other end. The clip 7 is provided with a notch 13 .in which the chain may be held as shown. After the end 5 has been inserted through the clips 4 the chain 11 may be wrapped around the device and insertedin the notch 13 so that it will positively hold the device as shown in Figure 3 and the diameter of the device may readily be changed by removing the chains from the notch 13 and placing one of the other links therein. The holding means may also be adjusted to distances between the length of a link by the bolt 9 as this may be screwed outward or inward to provide adjustment corresponding to the length of the link. It will therefore be observed that the'device may be readily adjusted very accurately and to any suitable size. The edge 2 at the lower end of the device is flared outward slightly as indicated by the numeral 14 shown in Fig ure 1 so that the device will not attempt to enter the cylinder. The thickness of the device is considerably exaggerated for the purpose of illustrating as it is made of very thin material, preferably about ten thousandths of an inch thick. The exact thickness is of course immaterial as material of any suitable thickness may be used.

It will be understood that changes may be made in the construction without departing from the spirit of theinvention. One of which changes may be in the exact shape or design of the plate as it is understood the exact curvature or the exact slope of .the cone is immaterial, another may be in the use of other means for holding the ends of the plates, and still another may be in the use of other means forproviding the adjustment.

The construction will readily be understood from the foregoing description. To

PATENT OFFICE.

pushed through, the rings willbe compressed into the ring grooves and the piston may enter the cylinder With the rings compressed. It is also apparent that this device will facilitate the assembling of pistons into cylinders as the piston may be rapidly forced straight into the cylinder without twisting or working it in so that considerable time will be saved. Figure 1 shows the piston entering the end of the cylinder with the device over the piston and the first ring compressed into place with the second ring slightly compressed and the third ring extending outward and as the movement of the'piston into the cylinder is continued the second and third rings will be compressed around the entire piston and as they enter the cylinder the rings will be compressed into the ring grooves. The "operation of the device is therefore very simple and; as it may readily be adjusted" to pistons of difierent sizes it will greatly facilitate the assembling of motors.v

Having thus fully described the invention, what I- claim as new and desire to secure by Letters Patent is 1.. In a deviceot the class described, a thin piece of material adaptable to form a cone when rolled, clips at the edges of one end adaptable to slide over the other end as it is rolled other clips onthe outer: surface, a screw n'lounted in one of the clips, and a chain attached to the said screw, the other of the said clips having a notch thereinadaptable to engage and hold the chain.

2. In adevice of the class. described; a thin piece of material having twoedges thereof curved in such amanner that as it is rolled it will form a cone with, a:- slight taper, clips at the edges of one end through which the other end slides, and means for holding the said device in different diameters.

EDWARD D. MURPHY- 

